The public symposium took place at the Carnegie
Institution's Administration Building, in the Elihu Root Auditorium.

The symposium started at 1:00 pm and ended at 5:00 pm, with a 15 minute break, and featured four Centennial Lectures. The lecturers were introduced by the Carnegie Institution's President, Richard A. Meserve,
and by the Department of Terrestrial Magnetism Director, Sean C.
Solomon.

Symposium Speakers:

To Penetrate the Mantle of Darkness:
DTMs Path Through the Twentieth Century
by Shaun J. Hardy
Department of Terrrestrial MagnetismYou can watch Shaun Hardy's lecture by clickling
here.

Speculations on Some Problems of Continental Evolution
by Thomas H. Jordan
University of Southern California, Los Angeles